hydromancy
/ˈhaɪdrəˌmænsi/
noun
- Divination or fortune-telling by interpreting the appearance, movement, or sounds of water.
- In ancient Greece, hydromancy was practiced by observing the patterns of water in a bowl.
- The wizard's hydromancy revealed a vision of a coming flood in the crystal-clear pool.
- Some cultures used hydromancy to predict rainfall or the outcome of battles.
Synonyms